Equivalent Expressions (6/7 grade)

Which expressions is equivalent to 25x - 10y?

• 5(5x - 2y)

• 5(5x - 10y)

• 5(20x - 5y)

• 5(20x - 10y)

Which expression is equivalent to 5y + 2y + 6x + 2y - x?

• 5x + 9y

• 5x + 6y

• 5x + 7y

• 7x + 7y

Which expressions is equal to 48 + 72?

• 24(2 + 3)

• 8(6 + 12)

• 3(14 + 24)

• 2(24 + 38)

Which choice is equivalent to the expression 4(x + 2y)?

• 4x + 8y

• 4x + 2y

• x + 8y

• 8xy

The length of a rectangle is 6 units longer than the width, w. Which choice is a correct expression for the perimeter of the rectangle?

• 4w + 12

• 2w + 6

• 2w + 12

• 4w + 6

Which expression represents the perimeter of the triangle?

• 9k + 36

• 10k + 25

• 20k + 25

• 24k + 36

Select all expressions that are equivalent to -3.75 + 2(-4x + 6.1) - 3.25x

• 7x - 2x + 8.1

• -1.75 - 7.25x + 6.1

• 8.45 - 8x - 3.25x

• -11.25x + 12.2 - 3.75

Select all expressions that are equivalent to 12 - 4x.

• 4(3 - x)

• -4(-3 + x)

• -4(x - 3)

• 2(6 - 2x)

Find the value for k that will make the following two expressions equivalent.

-10.5x + k and -2.1(5x - 3.7) + 4.1

Which expressions is equivalent to -4(x + 2) - ½(2x - 6)?

• -5x - 4

• -5x - 5

• -8x - 4

• -8x - 5